SOLIDUNGDLA 873 



embolism of the mesenteric arteries, with the consequent 

 paralysis of the bowel, an all-sufficient explanation, whilst 

 the causes of colic hitherto accepted were for the most part 

 insufficient. 



20. In a great number of cases the thrombus of the worm- 

 aneurism is continued past the mouth of the anterior mesenteric 

 artery, into the lumen of the aorta, and, as such, is the exclusive 

 cause of the embolisms of the pelvic and crural arteries which bring 

 about the intermittent hobblings (the author says " intermit- 

 terenden Hinken," not " Hahnentritten," the usual equivalent 

 term for stringhalt). Considering the excessive frequency of 

 the thrombus being continued into the aorta, it becomes highly 

 probable that a great part of the diseases and lameness of the 

 posterior extremities (" Hiift und Kreuzlahme, unsichtbarer 

 Spath, &c./" which may be rendered " sciatic and hip or spinal 

 lameness, obscure spavin, &c.") are due to occlusion of the arteries. 



21. Owing to the fibrous thickening of the connective tissue 

 of the root of the anterior mesenteric round the aneurism, and 

 to the considerable size of the latter, disturbances of the inner- 

 vation of the intestine, (as well as) hindrances to the passage of 

 the chyle, and irregularities in the portal circulation may be 

 created, which may well lie at the root of many chronic dis- 

 turbances of digestion in horses. 



22. Considering the great losses and heavy social disad- 

 vantages that are occasioned by the colic of horses to the 

 horse-breeder, to agriculture, and to the general welfare, it is 

 of the highest importance to discover means which should 

 prevent the introduction of the embryos with the food, and, as 

 a consequence, the migration of the palisade worms into the 

 mesenteric arteries of the horse. 



I wish it to be distinctly understood that the above summary 

 is translated from Bellinger (Die Kolik s. 257). Instructive 

 cases have been recorded both at home and abroad. Prof. 

 Yarnell has remarked that "foals and yearlings suffer more 

 from parasites in the paddocks than they do on adjoining farms 

 where only a few animals are bred." This is explained by 

 the relatively greater amount of egg-dispersion proceeding from 

 the infected brood-mares. It is quite evident that the lives of 

 many valuable animals are annually sacrificed by the neglect of 

 hygienic arrangements. The palisade worm is chiefly destruc- 

 tive to young animals, and as Mr. Percivall has well remarked, 

 these parasites are " commonly the cause of lingering and hidden 



